JP2921167B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and an object thereof is to clearly display a running state of a tape using one display device effectively.

[0002]

2. Description of the Related Art In recent years, a magnetic recording / reproducing apparatus (hereinafter abbreviated as VTR) has been widely used, and a linear counter system for counting and displaying control signals recorded on a tape on a tape running display has been adopted. I've been. The features of the method are shown below.

The conventional reel counter has a special relationship between the amount of tape wound on the reel and the counter value in a method of counting the rotation pulses of the reel, and can be used as a mere reference. In contrast, the linear counter uses the control signal (NT) recorded on the tape.
30Hz for SC system, 2 for PAL / SECAM system
5 Hz), and the count value is displayed in hours, minutes, and seconds, and the position of the tape can be represented in time by a method in which the travel distance of the tape is displayed in time.

On the tape search side, a relative address search method using a silent section of an audio track recorded on the tape or a section in which a duty ratio of a control signal changes as an index signal has been adopted and spread. When an index number is displayed as a search mode, a relative index number up to a portion to be searched is displayed on a linear counter display unit, and a search is performed by a fast-forward rewind operation. Each time an index signal is detected, the index number is decremented, and when the index number becomes 0, the display is returned to the linear counter.

[0005]

However, in this search mode display method, it is determined that the tape is running despite fast-forward rewind because the linear counter does not display during index search. I can't get it. Further, there is a disadvantage that it is not possible to know where the tape is now.

In view of the above problems, the present invention provides a linear counter display during an index search to indicate that the tape is running, and to change the index number when an index signal is detected or when the index number is confirmed and changed. An object of the present invention is to provide a magnetic recording / reproducing apparatus characterized by displaying for a fixed time.

[0007]

According to the present invention, there is provided a magnetic recording / reproducing apparatus comprising: an n-digit 7-segment linear counter display unit for counting and displaying control signals recorded on a tape; And a display control unit for displaying a linear counter display during index search and displaying the index number for a certain time when detecting the index signal or confirming and changing the index number. Have.

[0008]

According to the present invention, the tape running can be confirmed by displaying a counter during index search on one display unit by the above-mentioned structure, and the index number is displayed when the index signal is detected, the index number is confirmed or changed. Thus, the state of the search can be notified.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention, in which 11 is a control signal reproducing head, 12 is a control signal amplifier, 13 is a control signal counter, 14 is an index signal detector, 15 is a control unit,
Reference numeral 16 denotes a display unit, and 17 denotes a mechanism unit.

FIG. 2 is a diagram showing a display example of the display unit during the index search, wherein 21 is a case of counter display, and 22 is a case of index number display.

Next, the operation will be described. When performing an index search, a control signal is reproduced by the control head 11 as the tape runs, and is amplified by the control signal amplifier 12. The amplified control signal is input to the control signal counter 13 and the index signal detection unit 14. The count information counted by the control signal counter 13 enters the control unit 15. The index information detected by the index signal detector 14 enters the controller 15. When the index information is not received, the control unit 15 displays the counter display on the display unit 16.
Put out The display at that time is shown at 21 in FIG. When the index information is input to the control unit 15 from the index signal detection unit 14, the control unit 15 displays a value obtained by subtracting 1 from the current index number on the display unit 16 instead of the counter for a predetermined time. The display at this time is shown in FIG.
This is shown at 22 in (b). After a certain period of time, the control unit 15
Causes the display unit 16 to display a counter.

In this way, the control unit 15 displays the index number obtained by subtracting 1 every time an index signal is detected on the display unit 16 for a certain period of time. Finally, when the index number becomes 0, the control unit 15 outputs reproduction information to the mechanism unit 17 and switches the mechanism from the search mode to the reproduction mode. By displaying the counter display during the index search, the VTR user can confirm that the tape is running by seeing the change of the counter value on one display unit, and when the index signal is detected, the VCR user can use the index. The index display status can be confirmed by displaying the number.

[0013]

As described above, according to the present invention, it is possible to confirm the tape running by displaying the counter display during the index search on one display unit, and to detect the index signal, check the index number, and change the index number when changing. By displaying the number, the state of the search can be notified.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a display state according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 control signal reproducing head 12 control signal amplifier 13 control signal counter 14 control signal detection unit 15 control unit 16 display unit 17 mechanism unit

Claims (1)

(57) [Claims] A means for counting a control signal recorded on the tape; a means for detecting an index signal recorded on the tape; an n-digit seven-segment display for displaying a counter or index number; Control means for displaying a counter on the 7-segment display section during the search, and displaying an index number on the 7-segment display section for a fixed time when an index signal is detected or when the index number is confirmed and changed. A magnetic recording / reproducing apparatus characterized by the above-mentioned.